NICER observation list: Target ID 252001

Abstract

The ultracompact white dwarf systems HM Cnc and V407 Vul represent unique opportunities to probe binary evolution driven by gravitational radiation and mass transfer. Initial {\it NICER} observations have provided new, precise frequency measurements in both systems, and a first indication for a slowing of the spin-up in HM Cnc. We propose additional observations to extend the timing baselines for each source, enabling new, unique probes of their orbital evolution.
Obsid RA DEC l b Start End Exposure Number of
Modules
Number of
Processing
Status of
Processing
Date of
Processing
Public
date
2520010101 121.597 15.458 206.926 23.396 58617.2073 58617.8157 18528.0 52 3 VALIDATED 58624.1 58811